Green Vehicle Laws and Regulations in Washington DC

Eco-friendly Washington D.C. drivers can learn more about state laws that pertain to green vehicles. Whether you drive a hybrid, electric car, or any other alternative fuel vehicle, be aware of state-specific regulations for fuel-efficient vehicles.

As the owner of an electric vehicle (hybrid) or clean-fuel vehicle you might also be eligible for a reduced vehicle registration fee. Refer to the section on D.C. tax breaks also covered on our Green Driver Incentives page.

Idle Reduction Requirement for all D.C. Motorists

According to fueleconomy.gov, idling can burn through a quarter to a half-gallon of gas per hour. Not only is this bad for your pocketbook and the environment, it’s also illegal in the District of Columbia.

If your vehicle is powered by diesel fuel or gasoline, you may not leave it idling (for air conditioning purposes) for more than three consecutive minutes while parked, stopped, or standing. Exceptions to the rule include:

Requirements for Acquiring Alternative Fuel Fleet Vehicles

Operating a fleet—in what the Clean Air Act defines as an ozone nonattainment area—comes with a couple of requirements. If your fleet expands to 10 or more vehicles, a certain percentage of your newly purchased vehicles must use clean fuel. Washington D.C. uses gross vehicle weight rating (GVWR) to determine that number:

GVWR of 8,500 pounds or less—70% of new purchases must be clean fuel vehicles.

GVWR between 8,500 and 26,000 pounds—50% of new purchases must be clean fuel vehicles.

What is a Clean Fuel?

In meeting the AFV acquisition requirement mentioned above, D.C. considers a clean fuel as any fuel or other power source that complies with certain standards applicable when operating a clean fuel vehicle. These power source and fuel types include: